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