One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,7,4,6)(17,18,22,27)(19,28,33,43)(20,34,36,44)(21,25,29,26)(23,31,40,32)(24,37,42,38)(30,41,35,39)(45,47,48,46)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19,29,31,22,33,21,32)(18,23,25,43,27,40,26,28)(20,35,37,46,36,30,38,47)(24,41,44,45,42,39,34,48)(1,3,5,4)(2,7,8,6)(10,13)(14,16)(17,20,29,37,22,36,21,38)(18,24,25,44,27,42,26,34)(19,30,31,47,33,35,32,46)(23,39,43,48,40,41,28,45)(1,4,5,3)(2,6,8,7)(9,11)(10,14)(12,15)(13,16)(20,36)(24,42)(30,35)(34,44)(37,38)(39,41)(45,48)(46,47)(11,15)(14,16)(17,21,22,29)(18,25,27,26)(19,31,33,32)(20,37,36,38)(23,28,40,43)(24,34,42,44)(30,46,35,47)(39,48,41,45)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.