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