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