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