One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(11,12)(14,16)(17,18)(19,27)(20,32)(21,25)(22,26)(23,30)(24,34)(28,37)(29,38)(31,42)(33,39)(35,45)(36,41)(40,46)(43,48)(44,47) involution — undirected(2,5)(6,8)(9,10,13,15)(11,16,12,14)(17,19)(18,23)(20,33)(21,30)(22,29)(24,39)(25,27)(26,42)(28,34)(31,36)(32,37)(35,44)(38,41)(40,47)(43,46)(45,48)(1,3,4,7)(2,6,5,8)(9,11,13,12)(10,14,15,16)(17,20)(18,24)(19,28)(21,34)(22,35)(23,37)(25,32)(26,40)(27,39)(29,43)(30,33)(31,44)(36,46)(38,47)(41,45)(42,48)(9,12,13,11)(10,14,15,16)(18,25)(19,29)(22,36)(23,38)(24,32)(27,42)(28,43)(30,31)(33,44)(35,46)(37,47)(39,48)(2,5)(6,8)(20,34)(24,32)(28,33)(35,46)(37,39)(40,45)(43,44)(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.