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