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