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