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