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