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