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