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