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