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