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