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