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