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