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