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