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