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