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