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