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