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