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