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