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