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