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