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