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