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