One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4) involution — undirected(5,6,8,12,9,11,17,19)(7,13,14,20,15,10,16,18)(21,22)(23,29,31,36)(24,28)(25,27)(26,30,34,32)(33,35)(5,7,9,15)(6,10,11,13)(8,16,17,14)(12,20,19,18)(21,23)(22,26)(24,32)(25,31)(27,34)(28,36)(29,35)(30,33)(22,27)(26,34)(28,35)(29,36) 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.