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