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