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