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