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