I highly suggest you wait a while for many of the above reasons pointed out above. For one, don't get your hopes up too high at getting a $70k-$80k salary right out of college. I have a Bachelors in C.S., a Masters in C.S., and a Masters in Software Engineering, and have worked my way up the ladder at 4 different companies. I've never seen a starting salary that high in our field, even if you had a m.s. That being said, once you are working in our field, it is pretty easy to get big increases as long as you work hard and don't stay at one place for very long (keep moving companies every 2-3 years a few times, this will broaden your experience and jump salary much higher each time).
But lets forget about that and take the benefit of the doubt and just say you do nail a job at that rate at a good company, there's more to consider here. I'm going to make some assumptions here but lets think - you've probably never had a mortgage, never had a car loan installment, (both of these are negatives on your credit report) and basically don't really have much of a credit history yet. You probably don't have a bad credit history, but probably not a high one either. You definitely won't get approved until you have a job and can prove salary (so you have to wait until you have the job first). And even after that, a lot of banks will be hesitant to give out a big loan if this is your first job with only a few weeks or few months working unless you get it cosigned by someone with a long established credit history.
Ignoring all the above, lets say you do get a good salary, you have enough $$ saved up to bring down the amount to be financed, and you've been working for a few months now and can get the loan. It's still a bad idea to pay that much money for this car this early in your life. Car's depreciate in value. You're MUCH better off buying a home first and accruing equity. A major reason here is that mortgage interest and property taxes are tax deductible - reducing your tax obligation to uncle sam and saving you more money. Without those, you won't really have anything big to deduct and will just end up owing uncle sam a lot of money every year. For example, when I got my third job I sold my previous home and moved and was living at a house (rent-to-own) with the intention of buying the place from him eventually. That year I owed an extra $5k in taxes because I had nothing to deduct. (as opposed to previous years where I owned a home and get back several thousand each year). I was so appalled at how much I owed the IRS. Actually had to take a loan out to pay the government. I immediately bought the house. Then for that year, I got back $4k in refund, and the full year after than I got back $7k in refund. BIG DIFFERENCE WHEN YOU OWN A HOME. It's so much better to start building equity and paying the man less when possible.
Ok I know the Tesla is awesome and everything, but I'm just trying to stress to you how bad it would be to do this at your age before getting a home. If that's not enough to convince you, then how about this: Your car payment may prevent you from qualifying for a mortgage. That's right. If you buy a car first, and then try to buy a house, the combination of your monthly car payment + mortgage may actually exceed the bank's debt to income ratio requirements. If you don't have a lot of down payment to get the mortgage low enough, thats a very likely scenario and one a lot of people don't realize coming right out of college. so my advice to you would be to buy a home first, which will allow you to gain equity and use the interest and prop taxes to reduce what you owe the man. Once you have this established and you're working hard and working up the ladder and get bigger salary, only then should you consider buying a very expensive depreciating asset.
Besides, by that time the Gen III will be out with improved technology and will actually be a vehicle that is a more wise rational decision. If you still want the Model S at that point, yup as others have pointed out you can probably get a good used one by then.
In my case it was probably a mistake, but largely because the E-Type required constant maintenance, which was quite expensive.
