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