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