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