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