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)(7,15,17,20,18,19,16,11)(21,22)(23,26,30,33)(24,27)(25,28)(29,32,35,36)(31,34)(5,7)(6,11,14,20)(8,16)(9,17)(10,18)(12,19,13,15)(21,23)(22,26,28,33)(24,29)(25,30)(27,32,34,36)(31,35)(2,4)(5,8,10,9)(6,12,14,13)(7,16,18,17)(11,19,20,15)(21,24,25,31)(22,27,28,34)(23,29,30,35)(26,32,33,36)(5,8,10,9)(6,12,14,13)(7,17,18,16)(11,15,20,19)(23,30)(26,33)(29,35)(32,36)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.