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