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