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