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