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