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