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