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