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