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