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