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