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