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)(11,13)(12,14)(15,16)(17,18,22,25)(19,26,24,21)(20,23,28,30)(27,32,31,29)(2,5)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19,21,18,22,24,26,25)(20,27,29,23,28,31,32,30)(1,3,4,8)(2,6,5,7)(11,15)(13,16)(17,20,22,28)(18,23,25,30)(19,27,24,31)(21,29,26,32)(11,15)(13,16)(20,28)(23,30)(27,31)(29,32) involution — undirected(10,14)(13,16)(20,28)(23,30)(27,31)(29,32) 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.