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