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