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