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