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