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