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