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