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