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