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