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