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)(13,17)(14,18)(15,19)(16,20)(22,27)(23,31)(25,32)(28,34)(29,35)(30,36) involution — undirected(5,7)(6,10)(8,15)(9,13)(11,19)(12,17)(14,16)(18,20)(21,22,25,27,26,30,32,36)(23,28,33,29,31,35,24,34)(2,4)(7,13)(10,17)(14,15)(18,19)(21,23)(22,28)(24,32)(25,33)(26,31)(27,29)(30,35)(34,36) involution — undirected(5,8,9,16)(6,11,12,20)(7,14,13,15)(10,18,17,19)(21,24,26,33)(22,29,30,34)(23,32,31,25)(27,35,36,28)(6,12)(10,17)(11,20)(18,19)(23,31)(24,33)(28,35)(29,34) 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.