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