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