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