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