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