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