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