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