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