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