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