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