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)(11,13)(12,14)(15,16)(17,18,22,27)(19,28,31,24)(20,32,35,46)(21,26,23,38)(25,34,43,36)(29,44,33,47)(30,41,37,40)(39,45,42,48)(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,33)(21,37)(22,31)(23,30)(25,42)(26,41)(27,28)(29,35)(32,44)(34,45)(36,48)(38,40)(39,43)(46,47) involution — undirected(10,14)(11,15)(17,20,21,34,22,35,23,36)(18,25,38,46,27,43,26,32)(19,29,37,48,31,33,30,45)(24,39,40,44,28,42,41,47)(11,15)(13,16)(17,21,22,23)(18,26,27,38)(19,30,31,37)(20,34,35,36)(24,40,28,41)(25,32,43,46)(29,45,33,48)(39,44,42,47)(1,3,4,7)(2,6,5,8)(19,31)(20,35)(24,28)(25,43)(30,37)(32,46)(34,36)(40,41)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.