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