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