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