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