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