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