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