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