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