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)(11,13)(12,14)(15,16)(17,18,22,21,23,26,32,31)(19,27,28,20,25,29,30,24)(1,3,4,8)(2,5,6,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,26)(21,29)(22,30)(23,25)(27,31)(28,32)(2,6)(5,7)(9,11,12,16)(10,13,14,15)(17,20,23,24)(18,25,26,19)(21,30,31,28)(22,29,32,27)(3,8)(5,7)(11,16)(13,15)(17,21,22,26,23,31,32,18)(19,20,28,29,25,24,30,27)(10,14)(13,15)(19,25)(20,24)(27,29)(28,30) 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.