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