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