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