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