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