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