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