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