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