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