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