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