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