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