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