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