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