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