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