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