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