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