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