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