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