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