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