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)(21,22,25,24)(23,27,28,26)(31,35)(33,36)(2,4)(6,9)(7,11)(16,20)(18,19)(22,24)(23,28)(29,30,32,34)(31,36,35,33)(5,6,8,9)(7,10,11,12)(13,15,17,14)(16,19,20,18)(21,23,25,28)(22,26,24,27)(29,30)(31,33)(32,34)(35,36)(1,2)(3,4)(5,7)(6,10)(8,11)(9,12)(13,16)(14,18)(15,19)(17,20)(21,24,25,22)(23,26,28,27)(29,31)(30,33)(32,35)(34,36)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.