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