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