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