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)(21,22,26,28,27,32,25,31)(23,29,24,30,34,35,33,36)(5,6,9,10)(7,11,8,12)(13,15,17,16)(14,18,19,20)(22,28)(23,24)(25,26)(29,35)(31,32)(33,34)(5,7,9,8)(6,11,10,12)(14,19)(18,20)(21,23,25,33,27,34,26,24)(22,29,31,36,32,35,28,30)(2,4)(5,8,9,7)(6,11,10,12)(13,16,17,15)(14,20,19,18)(21,24,25,23,27,33,26,34)(22,30,31,29,32,36,28,35)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.