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