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