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