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