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