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