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