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