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