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