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)(15,20)(16,19)(17,18)(21,22,26,29,25,28,34,24)(23,30,33,31,32,27,35,36)(1,2)(3,4)(5,7,9,8)(6,10,11,12)(14,18)(19,20)(21,23,25,32)(22,27,28,30)(24,31,29,36)(26,33,34,35)(2,4)(5,8,9,7)(6,10,11,12)(13,15,17,16)(14,19,18,20)(21,24,34,28,25,29,26,22)(23,31,35,30,32,36,33,27)(6,11)(10,12)(13,16,17,15)(14,20,18,19)(23,32)(27,30)(31,36)(33,35)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.