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