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