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