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