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