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