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