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