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