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