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