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