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