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