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