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