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