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