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