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