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