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