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