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