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