Which College has had the most players drafted into the NFL all time?

"Which College has had the most players drafted into the NFL all time?"

George Halas, one of the NFL's original owners personally recruited U.
of Illinois star Red Grange in order to generate interest in the
1920's. College football was prefered to the pro game until after WW
II, with most college stars turning down offers to play pro football.
The draft was a slowly evolving enterprise starting in the 1930's.
Most team owners drafted players in their own region for star power
and because they had actually seen them play. Owners used newspapers
and college all star games as a means to find talent. So the Big Ten,
Notre Dame and East coast teams were prominent as were the military
academies. Halas, the Rooney and the Mara families found that SEC and
Texas based players were more likely to stick with the pro game.
Players like Frank Gifford out of USC in the 1950's encouraged other
players to follow. Also, into the 1960's, the CFL was a legitimate
alternative that frequently competed with the NFL.

http://www.jt-sw.com/football/pro/rosters.nsf

This site lists all known NFL teams and rosters by year with the
college the player attended. Hope this helps.