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