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