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