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)(11,15)(12,16)(13,14)(17,18,22,28)(19,25,30,24)(20,27,21,26)(23,31,32,29)(9,10)(11,16)(12,15)(13,14)(17,19,22,30)(18,23,28,32)(20,29,21,31)(24,26,25,27)(2,5)(6,8)(10,14)(15,16)(17,19)(18,24)(20,31)(21,29)(22,30)(23,27)(25,28)(26,32) involution — undirected(9,11,13,12)(10,15,14,16)(17,19)(18,25)(20,31)(21,29)(22,30)(23,26)(24,28)(27,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,15,14,16)(17,20,22,21)(18,26,28,27)(19,29,30,31)(23,25,32,24)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.