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