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