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