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