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