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