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