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