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