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