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