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