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