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