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