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)(23,29)(24,34)(25,35)(26,28)(27,32)(30,31)(33,36)(1,3,4,2)(6,9)(10,11)(13,15,16,20)(14,17,18,19)(21,23,31,24,26,33,25,32)(22,27,35,36,28,34,30,29)(5,7,8,12)(6,10,9,11)(15,20)(17,19)(22,28)(27,34)(29,36)(30,35)(6,9)(10,11)(14,18)(17,19)(21,24,31,33,26,32,25,23)(22,29,35,27,28,36,30,34)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.