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