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