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