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