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