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