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