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