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