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