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