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