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