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