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