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