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