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