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