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