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