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