A gaggle of graduates?

A flock of graduates?
A herd of graduates?
A murder of graduates?
A swarm of graduates?
I'll plump for a school of graduates, just seems right somehow.

There was a lot of them about in Glasgow today, all looking as pleased as punch with themselves and quite right too!

Doesn't look like Mr Dewar is sharing in the joy of the day. To be fair, he has been standing in the same spot for over ten years now, having his glasses periodically twisted off his face by the local wildlife. Can't really blame the Father of the Nation for looking a bit hacked off.