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