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)(13,16)(17,18,23,27,22,19,21,25)(20,26,28,32,30,24,29,31)(9,10)(11,16)(12,14)(13,15)(17,19,22,18)(20,24,30,26)(21,25,23,27)(28,32,29,31)(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,13,14,16)(17,20,22,30)(18,24,19,26)(21,29,23,28)(25,32,27,31)(10,14)(13,16)(17,21,22,23)(18,25,19,27)(20,28,30,29)(24,31,26,32)(1,4,5,3)(2,6,7,8)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.