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