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