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