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)(7,16)(8,20,23,30)(9,24)(10,14)(11,15)(12,18)(13,22,29,21)(17,32,34,26)(19,27)(25,28)(31,33,36,35)(5,7,9,18,11,19,10,25)(6,12,14,16,15,28,24,27)(8,17,22,35,23,34,21,33)(13,26,30,31,29,32,20,36)(5,8)(6,13)(7,17)(9,22)(10,21)(11,23)(12,26)(14,30)(15,29)(16,31)(18,35)(19,34)(20,24)(25,33)(27,36)(28,32) 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.