One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,8)(9,10)(11,16)(12,14)(13,15)(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)(11,12)(14,16)(18,22)(19,26)(24,28)(27,32)(2,3)(6,7)(9,11,13,12)(10,14,15,16)(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)(9,12,13,11)(10,14,15,16)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.