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