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