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