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