One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,7,4,6)(9,10,12,14)(11,13,15,16)(17,18,21,25)(19,24,27,23)(20,29,28,32)(22,31,30,26)(1,3,5,4)(2,6,8,7)(10,14)(11,15)(17,19,21,27)(18,23,25,24)(20,30,28,22)(26,29,31,32)(9,11,13,14,12,15,16,10)(17,20,22,19,21,28,30,27)(18,24,26,29,25,23,31,32)(1,4,5,3)(2,7,8,6)(10,14)(11,15)(18,25)(23,24)(26,31)(29,32)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.