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