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