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