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