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