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