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