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