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