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