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