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