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