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