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