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