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