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