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