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