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