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