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