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