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