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