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