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