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