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