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