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