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