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