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