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