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