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