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