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