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