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