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