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