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