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