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