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