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