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