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