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