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