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