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