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