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