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