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