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)(19,29)(20,34)(21,26)(22,27)(23,28)(24,32)(25,37)(30,39)(31,41)(33,40)(35,42)(36,44)(38,43)(45,46)(47,48)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19,22,32,23,33,21,31)(18,24,26,29,28,41,27,40)(20,35,38,46,36,30,37,47)(25,42,44,48,43,39,34,45)(1,3,5,4)(2,7,8,6)(10,13)(14,16)(17,20,21,37,23,36,22,38)(18,25,27,34,28,43,26,44)(19,30,31,46,33,35,32,47)(24,39,40,48,41,42,29,45)(1,3,5,4)(2,7,8,6)(9,11)(10,14)(12,15)(13,16)(20,36)(25,43)(30,35)(34,44)(37,38)(39,42)(45,48)(46,47)(1,4,5,3)(2,6,8,7)(11,15)(14,16)(17,21,23,22)(18,26,28,27)(19,31,33,32)(20,37,36,38)(24,29,41,40)(25,44,43,34)(30,46,35,47)(39,45,42,48)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.