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