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