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