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