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