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