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