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