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