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