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