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