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