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