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