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