Jon Raymond at 2015-05-03 20:01:38:
Not Exactly a formal graduation scene, but it works for me:
The Graduate (1967)
http://www.dailymotion.com/video/x20wgt4_graduate-1967-swimming-pool-scene_shortfilms
Mr. Braddock: Ben, what are you doing?
Benjamin: Well, I would say that I'm just drifting. Here in the pool.
Mr. Braddock: Why?
Benjamin: Well, it's very comfortable just to drift here.
Mr. Braddock: Have you thought about graduate school?
Benjamin: No.
Mr. Braddock: Would you mind telling me then what those four years of college were for? What was the point of all that hard work?
Benjamin: You got me.