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