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