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