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