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