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