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