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