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)(21,25)(22,36)(23,29)(24,34)(26,35)(28,44)(30,39)(32,48)(33,42)(37,41)(38,47)(40,45)(43,46)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,16)(13,14)(17,19)(18,23)(20,32)(21,29)(22,30)(24,40)(25,27)(26,39)(28,33)(31,44)(34,47)(35,46)(36,43)(37,45)(38,41)(42,48) involution — undirected(10,14)(15,16)(17,20,21,33)(18,24,25,41)(19,28,29,32)(22,37,35,34)(23,38,27,40)(26,42,36,31)(30,47,46,45)(39,44,43,48)(2,6)(5,7)(9,11,13,12)(10,15,14,16)(18,25)(19,29)(24,41)(26,36)(28,32)(30,46)(31,42)(45,47)(3,8)(5,7)(9,12,13,11)(10,15,14,16)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.