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