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