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