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)(12,16)(13,14)(17,18,21,23)(19,24,20,22)(25,26)(27,29)(28,31)(30,32)(2,6)(4,7)(10,14)(12,15)(17,19)(18,22)(20,21)(23,24)(25,26,28,31)(27,30,32,29)(9,11)(10,12)(13,16)(14,15)(17,18)(19,24)(20,22)(21,23)(25,27)(26,29)(28,32)(30,31) involution — undirected(1,3,5,8)(2,4,6,7)(9,11)(10,15)(12,14)(13,16)(17,18)(19,22)(20,24)(21,23)(25,27)(26,30)(28,32)(29,31)(1,4)(2,3)(5,7)(6,8)(9,12,13,15)(10,16,14,11)(17,20,21,19)(18,22,23,24)(25,26)(27,29)(28,31)(30,32)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.