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