One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(9,10,12,13)(11,14,15,16)(17,18,22,23)(19,27,29,24)(20,25,28,30)(21,26,31,32)(1,3,4,8)(2,5,6,7)(10,13)(14,16)(17,19,22,29)(18,24,23,27)(20,26,28,32)(21,30,31,25)(10,13)(14,16)(17,20,22,28)(18,25,23,30)(19,21,29,31)(24,32,27,26)(9,11,12,15)(10,14,13,16)(17,21)(18,26)(19,28)(20,29)(22,31)(23,32)(24,25)(27,30)(17,18,22,23)(19,24,29,27)(20,30,28,25)(21,26,31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.