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