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