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