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