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