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