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