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