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