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