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