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