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