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)(11,15)(12,16)(13,14)(17,18,20,23)(19,25,28,22)(21,24,29,32)(26,31,27,30)(1,3)(2,5)(4,8)(6,7)(17,19)(18,22)(20,28)(21,26)(23,25)(24,30)(27,29)(31,32) involution — undirected(2,6)(5,7)(10,14)(15,16)(19,26)(21,29)(22,30)(24,32)(25,31)(27,28) involution — undirected(2,6)(5,7)(9,11,13,12)(10,15,14,16)(18,23)(22,25)(24,32)(30,31)(3,8)(5,7)(9,12,13,11)(10,16,14,15)(19,27)(21,29)(22,31)(24,32)(25,30)(26,28)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.