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