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