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