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