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