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