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