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