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