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