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