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