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