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