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