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