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