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