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