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