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