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