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