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