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