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