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