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