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