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)(21,22,28,31,27,25,26,32)(23,33,30,29,35,24,34,36)(5,6,9,12)(7,13,14,10)(8,17,16,11)(15,18,20,19)(21,23,27,35)(22,29,25,36)(24,31,33,32)(26,30,28,34)(2,4)(5,7)(6,10)(8,15)(9,14)(11,18)(12,13)(16,20)(17,19)(21,24)(22,30)(23,32)(25,34)(26,29)(27,33)(28,36)(31,35) involution — undirected(7,14)(10,13)(15,20)(18,19)(21,25,28,32,27,22,26,31)(23,33,30,29,35,24,34,36)(5,8,9,16)(6,11,12,17)(7,15,14,20)(10,18,13,19)(21,26,27,28)(22,31,25,32)(23,34,35,30)(24,36,33,29)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.