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