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