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)(11,13)(12,14)(15,16)(17,18,22,27)(19,23,29,36)(20,24,32,40)(21,25,33,26)(28,34,41,46)(30,35,43,37)(31,38,44,39)(42,45,48,47)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,19)(18,23)(20,28)(21,30)(22,29)(24,34)(25,35)(26,37)(27,36)(31,42)(32,41)(33,43)(38,45)(39,47)(40,46)(44,48)(10,14)(13,16)(17,20,22,32)(18,24,27,40)(19,28,29,41)(21,31,33,44)(23,34,36,46)(25,38,26,39)(30,42,43,48)(35,45,37,47)(18,25)(21,33)(23,35)(24,38)(26,27)(30,43)(31,44)(34,45)(36,37)(39,40)(42,48)(46,47) involution — undirected(1,3,4,7)(2,6,5,8)(19,29)(23,36)(28,41)(30,43)(34,46)(35,37)(42,48)(45,47)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.