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