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