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