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