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