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