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