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)(11,14)(12,15)(13,16)(17,18,22,27)(19,28,31,42)(20,25,32,24)(21,34,36,26)(23,35,39,30)(29,44,45,43)(33,40,47,41)(37,46,38,48)(11,12)(14,15)(17,19,22,31)(18,23,27,39)(20,29,32,45)(21,35,36,30)(24,37,25,38)(26,42,34,28)(33,48,47,46)(40,44,41,43)(2,5)(6,8)(9,11,13,12)(10,14,16,15)(17,20)(18,24)(19,29)(21,33)(22,32)(23,37)(25,27)(26,40)(28,43)(30,46)(31,45)(34,41)(35,48)(36,47)(38,39)(42,44)(9,12,13,11)(10,15,16,14)(17,20)(18,25)(19,29)(21,33)(22,32)(23,38)(24,27)(26,41)(28,44)(30,46)(31,45)(34,40)(35,48)(36,47)(37,39)(42,43)(1,3,4,7)(2,6,5,8)(10,16)(14,15)(20,32)(24,25)(29,45)(33,47)(37,38)(40,41)(43,44)(46,48)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.