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