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