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