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