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