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)(17,18,21,24)(19,25,27,22)(20,23,28,30)(26,31,32,29)(2,5)(6,7)(9,10)(11,15)(12,16)(13,14)(20,28)(23,30)(26,32)(29,31) involution — undirected(1,2)(3,6)(4,5)(7,8)(9,11,13,12)(10,15,14,16)(17,18)(19,22)(20,23)(21,24)(25,27)(26,29)(28,30)(31,32)(17,19,21,27)(18,22,24,25)(20,26,28,32)(23,29,30,31)(1,2)(3,6)(4,5)(7,8)(17,20)(18,23)(19,26)(21,28)(22,29)(24,30)(25,31)(27,32) involution — undirected(1,3,4,8)(2,6,5,7)(9,12,13,11)(10,16,14,15)(17,18)(19,22)(20,23)(21,24)(25,27)(26,29)(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.