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