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