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