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