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