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