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