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