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