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