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