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