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