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