One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(4,6)(10,18)(14,19)(16,22)(20,21)(24,25)(26,33)(27,35)(36,37) involution — undirected(8,12)(13,15)(14,19)(20,21)(23,24,28,25)(26,29,33,31)(27,30,35,32)(34,36,38,37)(3,4)(5,6)(7,8)(9,15)(10,14)(11,12)(13,17)(16,21)(18,19)(20,22)(23,25,28,24)(26,29,33,31)(27,32,35,30)(34,36,38,37)(7,9,11,17)(8,13,12,15)(10,16,18,22)(14,20,19,21)(23,26,28,33)(24,29,25,31)(27,34,35,38)(30,36,32,37)(7,10)(8,14)(9,16)(11,18)(12,19)(13,20)(15,21)(17,22)(23,27)(24,30)(25,32)(26,34)(28,35)(29,36)(31,37)(33,38) 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.