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