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