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