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