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)(11,15)(12,13)(14,16)(17,18,23,27)(19,24,20,29)(21,25,28,32)(22,31,30,26)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19,23,20)(18,24,27,29)(21,30,28,22)(25,26,32,31)(10,13)(14,15)(17,20,30,28,23,19,22,21)(18,25,31,24,27,32,26,29)(9,11,12,16)(10,14,13,15)(17,21,22,19,23,28,30,20)(18,24,26,25,27,29,31,32)(1,4,5,3)(2,7,8,6)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.