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