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