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