There are interactive maps and such available here:
https://careers.wustl.edu/outcomes/#!ZGl2aXNpb249T2xpbiBCdXNpbmVzcyBTY2hvb2w=
You can click to see data for different undergrad schools, which is interesting. Like, Olin Business grads are WAY more concentrated in NY followed by IL (presumably mostly NYC and Chicago) than Arts & Sciences grads, and Missouri (presumably mostly St Louis) leaps from #3 to #1.