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