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