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