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