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