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