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