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