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