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