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