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