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