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