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