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