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