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