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