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