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