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