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