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