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