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