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