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