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