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)(9,14)(10,15)(11,16)(17,20)(18,19)(21,22,24,29,26,30,25,27)(23,31,34,28,32,35,33,36)(5,7,9,8,11,18,10,17)(6,12,15,13,16,20,14,19)(22,27,30,29)(23,32)(28,35,36,31)(33,34)(2,4)(5,8,9,18,11,17,10,7)(6,13,15,20,16,19,14,12)(21,23,25,33,26,32,24,34)(22,28,29,35,30,36,27,31)(5,9,11,10)(6,14,16,15)(7,8,18,17)(12,19,20,13)(21,24,26,25)(22,29,30,27)(23,33,32,34)(28,31,36,35)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.