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