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