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