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