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)(13,22)(14,26)(15,20)(16,18)(17,23)(19,27)(21,29)(24,31)(25,30)(28,34)(32,37)(33,39)(35,36)(38,41)(40,42) involution — undirected(3,5,6,10)(4,7,8,9)(11,13)(12,17)(14,24)(15,23)(16,25)(18,32)(19,31)(20,22)(21,30)(26,35)(27,36)(28,38)(29,37)(33,41)(34,40)(39,42)(5,10)(7,9)(12,18)(13,23)(16,29)(17,30)(19,33)(20,21)(22,32)(24,36)(26,34)(28,39)(31,40)(35,41) involution — undirected(4,8)(7,9)(11,14)(12,19)(13,24)(15,27)(16,28)(17,31)(18,33)(20,26)(21,34)(22,35)(23,36)(25,38)(29,39)(30,40)(32,41)(37,42) involution — undirected(14,27)(19,26)(24,36)(28,39)(31,35)(33,34)(38,42)(40,41) 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.