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