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