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