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