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