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