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