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