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