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