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