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