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