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