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