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