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