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