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