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)(7,17,20,29,21,12,19,28)(8,22,26,13,24,32,25,31)(18,34,23,27,35,30,36,33)(5,7,9,19,11,21,10,20)(6,12,16,29,15,17,14,28)(8,23,25,35,24,36,26,18)(13,30,22,33,31,34,32,27)(5,8,9,25,11,24,10,26)(6,13,14,32,15,31,16,22)(7,18,19,23,21,35,20,36)(12,27,28,34,17,33,29,30)(2,4)(6,14,15,16)(8,24)(12,28,17,29)(13,22,31,32)(18,35)(23,36)(25,26)(27,30,33,34)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.