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