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