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)(15,20)(16,18)(17,19)(21,22,27,30)(23,26,24,28)(25,33,35,29)(31,34,32,36)(6,7)(8,12)(13,15)(14,17)(16,20)(18,19)(21,23,27,24)(22,28,30,26)(25,31,35,32)(29,34,33,36)(6,7)(10,11)(14,16)(15,19)(21,24,27,23)(22,28,30,26)(25,31,35,32)(29,36,33,34)(1,2,3,4)(5,7,9,6)(8,10,12,11)(13,16,18,14)(15,17,19,20)(21,25,27,35)(22,29,30,33)(23,31,24,32)(26,36,28,34)(5,8,9,12)(6,10,7,11)(13,17)(14,19)(15,16)(18,20)(21,26,27,28)(22,23,30,24)(25,34,35,36)(29,32,33,31)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.