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