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