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