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