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