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