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