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