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