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)(19,25)(20,28)(21,26)(22,23)(24,27)(29,31)(30,32)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,19,21,22)(18,23,26,25)(20,27,29,30)(24,28,32,31)(11,12)(14,16)(17,20)(18,24)(19,27)(21,29)(22,30)(23,28)(25,31)(26,32) involution — undirected(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,14,15,16)(17,18)(19,23)(20,24)(21,26)(22,25)(27,28)(29,32)(30,31)(11,12)(14,16)(17,19,21,22)(18,25,26,23)(20,27,29,30)(24,31,32,28)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.