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)(13,23)(15,27)(17,32)(18,20)(22,36)(24,29)(25,30)(26,35)(28,34)(31,33) involution — undirected(5,7)(6,12)(8,22,25,17)(9,26)(10,19)(11,20)(13,28,29,31)(14,16)(15,18)(21,36,30,32)(23,34,24,33)(27,35)(5,8)(6,13)(7,17)(9,21)(10,25)(11,24)(12,28)(14,29)(15,30)(16,31)(18,32)(19,22)(20,34)(23,27)(26,36)(33,35) involution — undirected(2,4)(5,9,27,14,10,15,11,6)(7,18,35,12,19,26,20,16)(8,21,23,29,25,30,24,13)(17,32,33,28,22,36,34,31)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.