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