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