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