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