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