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