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