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)(18,20)(19,25)(22,26)(23,30)(27,32)(28,31) involution — undirected(1,3,5,2)(4,7,8,6)(11,12)(14,16)(17,18,21,20)(19,23,27,28)(22,24,26,29)(25,31,32,30)(2,3)(6,7)(9,11,13,12)(10,14,15,16)(17,19,26,32,21,27,22,25)(18,23,29,30,20,28,24,31)(1,4,5,8)(2,6,3,7)(17,20,21,18)(19,23,27,28)(22,29,26,24)(25,31,32,30)(9,12,13,11)(10,14,15,16)(18,20)(23,28)(24,29)(30,31)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.