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