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