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