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