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