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