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