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