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