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