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