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