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