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