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)(23,27,33,36)(24,29,26,30)(31,35,32,34)(5,7)(6,11)(8,15)(9,18)(10,16)(12,19)(13,14)(17,20)(21,23,25,33)(22,27,28,36)(24,32,26,31)(29,34,30,35)(1,2,3,4)(22,28)(23,31)(24,26)(27,34)(32,33)(35,36)(5,8,10,9)(6,12,13,17)(7,15,16,18)(11,19,14,20)(21,24,25,26)(22,29,28,30)(23,32,33,31)(27,34,36,35)(5,9,10,8)(6,12,13,17)(7,15,16,18)(11,20,14,19)(23,31)(24,26)(27,35)(29,30)(32,33)(34,36)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.