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