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