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