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