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