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