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