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