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