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