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