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