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