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