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