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