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)(11,14)(12,13)(15,16)(18,23)(24,37)(25,31)(26,36)(27,41)(38,39)(40,47)(42,43) involution — undirected(3,8)(5,7)(10,13)(11,15)(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)(9,11,12,15)(10,14,13,16)(17,20)(18,25)(19,28)(21,33)(22,34)(23,31)(24,38)(26,40)(27,42)(29,32)(30,45)(35,44)(36,47)(37,39)(41,43)(46,48)(10,13)(14,16)(19,29)(20,33)(24,37)(25,31)(27,41)(30,46)(34,44)(40,47) 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.