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