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